/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:33:44,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:33:44,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:33:44,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:33:44,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:33:44,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:33:44,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:33:44,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:33:44,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:33:44,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:33:44,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:33:44,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:33:44,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:33:44,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:33:44,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:33:44,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:33:44,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:33:44,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:33:44,739 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:33:44,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:33:44,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:33:44,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:33:44,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:33:44,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:33:44,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:33:44,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:33:44,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:33:44,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:33:44,745 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:33:44,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:33:44,746 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:33:44,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:33:44,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:33:44,746 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:33:44,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:33:44,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:33:44,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:33:44,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:33:44,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:33:44,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:33:44,748 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:33:44,748 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:33:45,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:33:45,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:33:45,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:33:45,141 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:33:45,142 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:33:45,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c [2021-02-22 01:33:45,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966a4881d/a1a63f5ee9e94120a85cf41760f66bc7/FLAG313e169f0 [2021-02-22 01:33:45,863 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:33:45,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c [2021-02-22 01:33:45,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966a4881d/a1a63f5ee9e94120a85cf41760f66bc7/FLAG313e169f0 [2021-02-22 01:33:45,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966a4881d/a1a63f5ee9e94120a85cf41760f66bc7 [2021-02-22 01:33:45,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:33:45,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:33:45,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:33:45,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:33:45,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:33:45,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:33:45" (1/1) ... [2021-02-22 01:33:45,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5640a1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:45, skipping insertion in model container [2021-02-22 01:33:45,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:33:45" (1/1) ... [2021-02-22 01:33:45,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:33:45,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:33:46,102 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c[354,367] [2021-02-22 01:33:46,108 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c[442,455] [2021-02-22 01:33:46,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:33:46,121 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:33:46,136 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c[354,367] [2021-02-22 01:33:46,137 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c[442,455] [2021-02-22 01:33:46,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:33:46,154 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:33:46,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46 WrapperNode [2021-02-22 01:33:46,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:33:46,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:33:46,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:33:46,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:33:46,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (1/1) ... [2021-02-22 01:33:46,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (1/1) ... [2021-02-22 01:33:46,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (1/1) ... [2021-02-22 01:33:46,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (1/1) ... [2021-02-22 01:33:46,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (1/1) ... [2021-02-22 01:33:46,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (1/1) ... [2021-02-22 01:33:46,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (1/1) ... [2021-02-22 01:33:46,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:33:46,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:33:46,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:33:46,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:33:46,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:33:46,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:33:46,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:33:46,299 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:33:46,299 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-22 01:33:46,299 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2021-02-22 01:33:46,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:33:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:33:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:33:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:33:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:33:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-22 01:33:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2021-02-22 01:33:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:33:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:33:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:33:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:33:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:33:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:33:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:33:46,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:33:46,591 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:33:46,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:33:46 BoogieIcfgContainer [2021-02-22 01:33:46,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:33:46,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:33:46,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:33:46,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:33:46,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:33:45" (1/3) ... [2021-02-22 01:33:46,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134be23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:33:46, skipping insertion in model container [2021-02-22 01:33:46,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:33:46" (2/3) ... [2021-02-22 01:33:46,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134be23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:33:46, skipping insertion in model container [2021-02-22 01:33:46,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:33:46" (3/3) ... [2021-02-22 01:33:46,621 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-2.c [2021-02-22 01:33:46,640 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:33:46,651 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-02-22 01:33:46,694 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-02-22 01:33:46,723 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:33:46,723 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:33:46,723 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:33:46,723 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:33:46,724 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:33:46,724 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:33:46,724 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:33:46,724 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:33:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-02-22 01:33:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-22 01:33:46,754 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:33:46,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:33:46,756 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:33:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:33:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1820668999, now seen corresponding path program 1 times [2021-02-22 01:33:46,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:33:46,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736699184] [2021-02-22 01:33:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:33:46,868 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:33:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:33:47,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:47,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:33:47,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:47,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:33:47,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:47,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 01:33:47,130 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-22 01:33:47,131 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-22 01:33:47,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:47,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:33:47,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:33:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:33:47,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:47,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:33:47,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-22 01:33:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:33:47,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:33:47,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:33:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:33:47,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736699184] [2021-02-22 01:33:47,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:33:47,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 01:33:47,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887209335] [2021-02-22 01:33:47,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 01:33:47,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:33:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 01:33:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-22 01:33:47,318 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2021-02-22 01:33:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:33:47,519 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-02-22 01:33:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 01:33:47,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-02-22 01:33:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:33:47,529 INFO L225 Difference]: With dead ends: 47 [2021-02-22 01:33:47,529 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 01:33:47,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:33:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 01:33:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 01:33:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 01:33:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 01:33:47,564 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-02-22 01:33:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:33:47,564 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 01:33:47,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 01:33:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 01:33:47,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 01:33:47,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:33:47,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 01:33:48,029 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-22 01:33:48,030 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-22 01:33:48,030 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-22 01:33:48,030 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-22 01:33:48,031 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-22 01:33:48,031 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 01:33:48,031 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-22 01:33:48,031 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-22 01:33:48,031 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-22 01:33:48,032 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-22 01:33:48,032 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-22 01:33:48,032 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-22 01:33:48,032 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-22 01:33:48,033 INFO L185 CegarLoopUtils]: At program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:48,033 INFO L185 CegarLoopUtils]: At program point fFINAL(lines 8 13) the Hoare annotation is: (or (not (= |f_#in~n| 2)) (= 2 f_~n)) [2021-02-22 01:33:48,033 INFO L185 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:48,034 INFO L185 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:48,034 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:48,034 INFO L185 CegarLoopUtils]: At program point L11-1(lines 8 13) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:48,035 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (or (not (= |f_#in~n| 2)) (= 2 f_~n)) [2021-02-22 01:33:48,035 INFO L185 CegarLoopUtils]: At program point L10-1(line 10) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:48,035 INFO L185 CegarLoopUtils]: At program point L10-2(line 10) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-22 01:33:48,035 INFO L185 CegarLoopUtils]: At program point fEXIT(lines 8 13) the Hoare annotation is: (or (not (= |f_#in~n| 2)) (= 2 f_~n)) [2021-02-22 01:33:48,036 INFO L192 CegarLoopUtils]: At program point fENTRY(lines 8 13) the Hoare annotation is: true [2021-02-22 01:33:48,036 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-22 01:33:48,036 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 01:33:48,036 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-22 01:33:48,036 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-22 01:33:48,037 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 22 24) the Hoare annotation is: true [2021-02-22 01:33:48,037 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 22 24) the Hoare annotation is: true [2021-02-22 01:33:48,037 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 22 24) the Hoare annotation is: true [2021-02-22 01:33:48,037 INFO L192 CegarLoopUtils]: At program point f2Err0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: true [2021-02-22 01:33:48,037 INFO L192 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: true [2021-02-22 01:33:48,038 INFO L192 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: true [2021-02-22 01:33:48,038 INFO L192 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: true [2021-02-22 01:33:48,038 INFO L192 CegarLoopUtils]: At program point L18-1(lines 15 20) the Hoare annotation is: true [2021-02-22 01:33:48,038 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-22 01:33:48,039 INFO L192 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: true [2021-02-22 01:33:48,039 INFO L192 CegarLoopUtils]: At program point f2EXIT(lines 15 20) the Hoare annotation is: true [2021-02-22 01:33:48,039 INFO L192 CegarLoopUtils]: At program point L17-2(line 17) the Hoare annotation is: true [2021-02-22 01:33:48,039 INFO L192 CegarLoopUtils]: At program point f2ENTRY(lines 15 20) the Hoare annotation is: true [2021-02-22 01:33:48,039 INFO L192 CegarLoopUtils]: At program point f2FINAL(lines 15 20) the Hoare annotation is: true [2021-02-22 01:33:48,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:33:48 BoogieIcfgContainer [2021-02-22 01:33:48,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:33:48,059 INFO L168 Benchmark]: Toolchain (without parser) took 2166.15 ms. Allocated memory is still 161.5 MB. Free memory was 137.0 MB in the beginning and 84.8 MB in the end (delta: 52.2 MB). Peak memory consumption was 53.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:48,060 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 161.5 MB. Free memory is still 135.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:33:48,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.62 ms. Allocated memory is still 161.5 MB. Free memory was 136.0 MB in the beginning and 126.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:48,062 INFO L168 Benchmark]: Boogie Preprocessor took 33.94 ms. Allocated memory is still 161.5 MB. Free memory was 126.8 MB in the beginning and 125.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:48,063 INFO L168 Benchmark]: RCFGBuilder took 405.37 ms. Allocated memory is still 161.5 MB. Free memory was 125.5 MB in the beginning and 111.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:48,064 INFO L168 Benchmark]: TraceAbstraction took 1453.53 ms. Allocated memory is still 161.5 MB. Free memory was 110.8 MB in the beginning and 84.8 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:33:48,068 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 161.5 MB. Free memory is still 135.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.62 ms. Allocated memory is still 161.5 MB. Free memory was 136.0 MB in the beginning and 126.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.94 ms. Allocated memory is still 161.5 MB. Free memory was 126.8 MB in the beginning and 125.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 405.37 ms. Allocated memory is still 161.5 MB. Free memory was 125.5 MB in the beginning and 111.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1453.53 ms. Allocated memory is still 161.5 MB. Free memory was 110.8 MB in the beginning and 84.8 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - ProcedureContractResult [Line: 8]: Procedure Contract for f Derived contract for procedure f: !(\old(n) == 2) || 2 == n - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 15]: Procedure Contract for f2 Derived contract for procedure f2: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 9 SDslu, 33 SDs, 0 SdLazy, 15 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 50 PreInvPairs, 56 NumberOfFragments, 111 HoareAnnotationTreeSize, 50 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 39 FomulaSimplificationsInter, 230 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...